eggUtilities.cxx

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/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file eggUtilities.cxx
 * @author drose
 * @date 1999-01-28
 */

#include "eggUtilities.h"
#include "eggPrimitive.h"
#include "eggGroupNode.h"
#include "pt_EggTexture.h"
#include "dcast.h"


/**
 * Extracts from the egg subgraph beginning at the indicated node a set of all
 * the texture objects referenced, grouped together by filename.  Texture
 * objects that share a common filename (but possibly differ in other
 * properties) are returned together in the same element of the map.
 */
void
get_textures_by_filename(const EggNode *node, EggTextureFilenames &result) {
  if (node->is_of_type(EggPrimitive::get_class_type())) {
    const EggPrimitive *prim = DCAST(EggPrimitive, node);

    int num_textures = prim->get_num_textures();
    for (int i = 0; i < num_textures; i++) {
      PT_EggTexture tex = prim->get_texture(i);
      result[tex->get_filename()].insert(tex);
    }

  } else if (node->is_of_type(EggGroupNode::get_class_type())) {
    const EggGroupNode *group = DCAST(EggGroupNode, node);

    EggGroupNode::const_iterator ci;
    for (ci = group->begin(); ci != group->end(); ++ci) {
      get_textures_by_filename(*ci, result);
    }
  }
}